[commons-numbers] 03/06: [NUMBERS-78] Increase coverage of reciprocal

[ah...@apache.org]

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aherbert pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-numbers.git

commit 75b94a2d28b59c8bc73c646f6020869043f8a167
Author: Alex Herbert <ah...@apache.org>
AuthorDate: Wed Dec 4 19:38:26 2019 +0000

    [NUMBERS-78] Increase coverage of reciprocal
---
 .../java/org/apache/commons/numbers/complex/ComplexTest.java   | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/ComplexTest.java b/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/ComplexTest.java
index 2711c61..005d7b3 100644
--- a/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/ComplexTest.java
+++ b/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/ComplexTest.java
@@ -372,6 +372,16 @@ public class ComplexTest {
     }
 
     @Test
+    public void testReciprocalMax() {
+        // This hits the edge case in reciprocal() for when q != 0 but scale == 0
+        final double smaller = Math.nextDown(Double.MAX_VALUE);
+        Complex z = Complex.ofCartesian(smaller, Double.MAX_VALUE);
+        Assertions.assertEquals(Complex.ofCartesian(0.0, -0.0), z.reciprocal());
+        z = Complex.ofCartesian(Double.MAX_VALUE, smaller);
+        Assertions.assertEquals(Complex.ofCartesian(0.0, -0.0), z.reciprocal());
+    }
+
+    @Test
     public void testMultiply() {
         final Complex x = Complex.ofCartesian(3.0, 4.0);
         final Complex y = Complex.ofCartesian(5.0, 6.0);